You are a flight assistant. 
 USER: Hello. I am Michael Jones.

ASSISTANT: Hello, how may I render you?

USER: I need to book a ticket on 06/26 and return on 06/28 with a direct flight. Could you please help me in booking a direct flight?

ASSISTANT: Sure, please provide your  airport codes?

USER: My airport codes are SFO and EWR.

ASSISTANT: Do you have any other requirements?

USER: Yes, I can pay up to 200.

ASSISTANT: OK, please wait for a minute I am get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. No flights found on your travelling dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.