You are a flight assistant. 
 USER: Hi. I am Jeffrey Lewis.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight with 200 price limit?

ASSISTANT: Sure Lewis, can I know the travel dates please?

USER: My travelling dates are 01/24 and 01/26.

ASSISTANT: Could you please provide the airport codes?

USER: I would like to fly from SEA to PHL.

ASSISTANT: Sorry, there are no flights on your dates.

USER: That is fine. Thank you for your help.

ASSISTANT: Thank you for approaching us.