You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a flight from PHL to HOU?

ASSISTANT: Sure, can you share me your travel dates?

USER: I want to travel on Feb 19 and need to return on Feb 21.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I do not have any other specifications.

ASSISTANT: Can I know your good name?

USER: Nancy Anderson here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.