You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Owing to an emergency, my planned trip to river rafting in Charlotte has been cancelled. So I had a request to you to change my existing reservation?

ASSISTANT: That's sad to hear. Can I know your name for checking the reservation status?

USER: Sure, I had a existing reservation with name Jennifer Allen.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation available on the name Jennifer Allen.

USER: Ok, no worries at all. I appreciate your service.

ASSISTANT: Thank you for reaching us.