You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you at this moment?

USER: I am Rebecca Clark. I am planning to visit reading terminal market in Philadelphia, PHL. Can you help me to book a connecting flight?

ASSISTANT: I am here to help you with that Rebecca Clark. Can you please provide your source of journey?

USER: My source is from San Francisco, SFO.

ASSISTANT: On which dates you are willing to travel can you please let me know?

USER: My trip dates are Sept 11 and 13.

ASSISTANT: Do you have any specific time at the time of departure and arrival?

USER: I want to depart in the evening time and return in the afternoon time.

ASSISTANT: Sorry to say this Rebecca Clark, there are no flights as per your requirements.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: You are welcome, thank you for reaching our service. Have a safe journey.