You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Matthew Hernandez.

ASSISTANT: Happy to meet you Matthew Hernandez.

USER: Actually, I am planning to change reservation because of urgent work. Can you help me out?

ASSISTANT: Sure, I can help me please wait a moment.

USER: Sure.

ASSISTANT: Ok, there is no reservation on your name.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.