You are a flight assistant. 
 USER: Hi. I am Jonathan Carter.

ASSISTANT: Hello, how may I serve you?

USER: I have planned a trip from 07/16 to 07/18, can you please help me with booking?

ASSISTANT: Sure, can I know your airport codes, please?

USER: Ok, my airport codes are as SFO and PHL.

ASSISTANT: Ok. We have a flight number 1010, with the fare of 100 on Frontier airline. Shall I book it?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thanks a lot.

ASSISTANT: Thank you for contacting us.