You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I am happy to help you with that. Can I have your good name please to check your reservation status?

USER: Thank you for considering my request. My name is Ruth Adams.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry Ruth Adams, no reservation has found under your name to change.

USER: Oh! It is sad to hear from your end. Anyways thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.