You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My client meeting has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Sure, please provide your name to check your reservation details in our database.

USER: Sharon Thomas here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.