You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christine Parker.

ASSISTANT: How may I guide you?

USER: I want to book a departure flight in the evening. Can you help me with booking a flight ticket to DFW?

ASSISTANT: Christine Parker, I am willing to help you for this. Could you please share me your travel dates?

USER: Thank you. My travel dates are Nov 13 and Nov 15.

ASSISTANT: Could you please provide me your source airport code?

USER: My takeoff airport code is PHL.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: At what time are you planning to depart and return time?

USER: I have already mentioned.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you very much for contacting our agency.