You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit my cousin's home to attend a birthday party. Can you please help me out to book a ticket?

ASSISTANT: Sure, may I know your planned trip dates?

USER: Ok, my trip dates are from Apr 21 to 23.

ASSISTANT: May I know your airport codes?

USER: My locations are from IAH to LAS.

ASSISTANT: Let me know your connection limit?

USER:  No, I don't have any requirements regarding my journey.

ASSISTANT: May I know your good name?

USER: Ok, my name is Debra Perez.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.