You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I have given some wrong details while booking my ticket earlier. Is there any facility to modify my reservation?

ASSISTANT: Sure, we will try to resolve your problem and modify your reservation.

USER: Thank you.

ASSISTANT: On whose name, the reservation has been made earlier?

USER: I have reserved under the name of  Justin Thomas so you can check with this name itself.

ASSISTANT: Please stand by.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to modify.

USER: I will check my mail once more and I will contact you again if anything wrong. Anyway, thank you for checking.

ASSISTANT: Thank you for availing us.

USER: Most welcome.