You are a flight assistant. 
 USER: Hello. I am Scott Green, I am looking for a direct flight to attend meeting with company share holders.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a flight under fare of 200 ?

ASSISTANT: Sure, may I know your travel dates?

USER: I will fly on 01/22 and return on 01/24.

ASSISTANT: Can you please share airport codes?

USER: I will travel from PA-PHL to CA-SFO.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no direct flight on your details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.