You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you today?

USER: As my family trip got postponed. So I need to change my reservation. Can you help me with changing my reservation?

ASSISTANT: Sure, for that I need to know your name. Can you provide it?

USER: Lisa Collins is my name.

ASSISTANT: Just a moment I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for your time. We did not found any reservation on this name.

USER: No issues. Thanks for your service.

ASSISTANT: Thanks for opting us.