You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me to change the travel dates of my reservation?

ASSISTANT: Sure, can you give me your name?

USER: My name is Patrick King.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.