Hello. I am Richard Thompson.
user
Hello, how may I serve you?
assistant
I need to modify my travelling dates in my existing reservation which was reserved last week, because my trip for Philadelphia was postponed. Could you please help me?
user
Sure, let me check and revert you. Sorry to notify, there is no reservation found on your given name.
assistant
No problem, thank you for the information.
user
Thank you for reaching us.
assistant