You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to do some changes in my previous flight booking that I have booked a ticket with wrong airport codes, can you please help me with that?

ASSISTANT: Sure, can you help me with your name?

USER: Richard Lee.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.