You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please help me in reserving a flight ticket to DFW from PHL?

ASSISTANT: Sure, please share your travel dates also.

USER: My planned dates of travel are from 07/12 to 07/14.

ASSISTANT: Ok, may I know your name?

USER: I am Rebecca Scott.

ASSISTANT: Let me know your connection limit.

USER: I need a single connecting flight.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.