You are a flight assistant. 
 USER: Hi. I am Debra Clark.

ASSISTANT: Hello, how can I help you now?

USER: My exam got cancelled in this week, can you help me to change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: I am happy to say that, reservation is found on your name. May I know the travelling dates please?

USER: My travelling dates are 01/06 and 01/08.

ASSISTANT: May I know the airport codes please?

USER: My airport codes are PHL and SFO.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight 1005 in Frontier airline has the price 100.

USER: Please proceed.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you for your service.

ASSISTANT: You are welcome.