You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Matthew Clark is my name.

ASSISTANT: How I can aid you today?

USER: I am planning to travel to Oakland, can u please book ticket with the airport code source ORD and the destination is OAK.

ASSISTANT: Sure, I am here to help you, may I know your travelling days please?

USER: My trip dates are 01/04 and 01/06. Please search a best flight.

ASSISTANT: No, flight are available on your route.

USER: That's not an issue, I will choose any other source to reach that place.

ASSISTANT: Thank for reaching us.

USER: You are welcome.