You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to change my ticket booking due to some issues, can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please tell me your name?

USER: My name is James Baker.

ASSISTANT: Sorry for the trouble, there is no reservation found with your name in our database.

USER: No problem, thank you for your help,.

ASSISTANT: You are welcome. Thank you for reaching us.