You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Jones.

ASSISTANT: How can I help you today?

USER: Can you please help me in booking a flight ticket from IAH to PHL?

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

USER: I want to fly on July 22 and return on July 24.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a halt.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.