You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Shirley Moore. As my friend's marriage is preponed, So I would like to change my recent reservation. Can you help me in changing my resent reservation?

ASSISTANT: Sure, I am here to help you. Please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: Not an issue, thank you for your assistance.

ASSISTANT: Thank you for reaching us, have a nice day.