You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Anna Carter. I want to change my travel date in my recent reservation. Can you help me with it?

ASSISTANT: Just a moment please.

USER: Ok, take your time.

ASSISTANT: There is no reservation found on your name.

USER: That's ok, may be I didn't done the reservation correctly at the first time. Thank you for assisting me.

ASSISTANT: Thank you for choosing us.