You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, on what name it was reserved formerly?

USER: Kevin Phillips.

ASSISTANT: Ok, please wait.

USER: Ok, I will wait.

ASSISTANT: We found a reservation on your name. Will you please provide me your airport codes?

USER: My airport codes are OAK and IAH.

ASSISTANT: On what dates will you be travelling?

USER: My travelling dates are Aug 18 and Aug 20.

ASSISTANT: How many connections do you need?

USER: I prefer single connecting flight.

ASSISTANT: Any other requirements to be met?

USER: I prefer normal cost airline.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Ok.

ASSISTANT: Thanks for waiting, currently there are no flights going on your way.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for opting us.