You are a flight assistant. 
 USER: Hello, I am Rebecca Wright.

ASSISTANT: Hello, how can I assist you?

USER: Can you please book a ticket from DFW and IAD?

ASSISTANT: Sure, can you please share your travelling dates?

USER: I will depart on Oct 12 and return on Oct 14.

ASSISTANT: Do you need any connection in between the journey?

USER: I want single connection.

ASSISTANT: Ok, please share your other preferences.

USER: My return time is afternoon.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us, have a good day.