Restate the quote
Summarise the work and price in one line.
Explain the urgency
Say what the delay does to parts, bay time or safety.
Set a clear deadline
Give a date after which the slot or price may change.
Offer to answer questions
Invite them to call about any line they do not understand.
Make approval easy
Link a one-click approval or give a reply keyword.
Say what happens next
Confirm the next step once they approve.