You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Could you please help me to update my travelling dates in my existing reservation?

ASSISTANT: Ok, please can I know your name to check the records?

USER:   I am Jennifer Wilson.

ASSISTANT: Please can you wait for a moment while I check for your reservation?

USER: Sure.

ASSISTANT: Sorry, there is no reservation been found on your name to proceed further.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Ok, thank you for choosing our agency.