You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Martinez.

ASSISTANT: How can I guide you?

USER: Can you me to change a flight ticket, so I can book with new dats?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Shirley, I did not find any reservation under your name.

USER: That's ok, not a problem. Thank you assisting me.

ASSISTANT: It's my pleasure, have a great day.