You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you now?

USER: I need your help in changing my flight reservation as my project got extended, can you please help me?

ASSISTANT: Sure, I can do that for you and on whose name the previous booking is done?

USER: The reservation was done in the name of Susan Davis.

ASSISTANT: Give me a while to search your previous booking in our portal.

USER: Sure.

ASSISTANT: Thank you for being on hold, I have checked with your information in my portal to change your booking but is displayed that there is no user name found to change it.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: You are welcome.