You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Jennifer Walker.

ASSISTANT: How can I assist you today?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, will you please give me a moment?

USER: Ok, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Welcome, have a great day.