You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Actually my Hockey competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, may I know your name please?

USER: Ok, I am Joseph Walker.

ASSISTANT: Wait a while, kindly.

USER: Sure.

ASSISTANT: We found a reservation in your name. Can I have your airport codes?

USER: Ok, my airport codes are from Boston BOS to  Seattle SEA.

ASSISTANT: Help me with the trip dates?

USER: Yes, my planned trip dates are on July 08 and return on July 10.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a single connecting flight.

ASSISTANT: Sorry, no flights were available at this moment.

USER: Ok, not an problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.