You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: My trip was postponed, so I need to change the reservation, can you help me in that?

ASSISTANT: Sure, I will help you on that.

USER: Thank you.

ASSISTANT: Could you please provide your name to check your reservation status?

USER: My name is Shirley Hall.

ASSISTANT: Ok Hall, please wait a moment to check.

USER: Ok.

ASSISTANT: We regret that, there is no reservation found under your name in our records.

USER: It's ok, no issues. Thank you for searching.

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

USER: You are welcome.