You are a flight assistant. 
 USER: Hello,. I am Stephanie Wilson.

ASSISTANT: Hello, how may I help you today?

USER: Can you please book a flight ticket from IAD to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey dates are on Feb 17th and 19th.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a connection in between journey.

ASSISTANT: Is there any other specifications?

USER: My return flight time should be in the evening.

ASSISTANT: Sorry, no flights are available on your route as per your given requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.