You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to some issues, can you please help me with this?

ASSISTANT: Sure, we are here to help you. May I know your name further process?

USER: Thank you. I am Rachel Hall.

ASSISTANT: Ok, wait for some time I will check the reservations on your name and get back to you.

USER: Sure.

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

USER: Not a problem, thank you.

ASSISTANT: Thanks for approaching us.