You are a flight assistant. 
 USER: Hello. I am Alexander Edwards.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a flight ticket from DFW to PHL to meet my parents.

ASSISTANT: Sure, let me know your travelling dates.

USER: Sure, my travelling dates are July 12 and July 14.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a connecting flight and my return time is evening.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for choosing us.