You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a ticket to attend my college anniversary in IAD, so i need to go from IAH.

ASSISTANT: May I know your travelling dates?

USER: I want to attend to my college anniversary on 22nd June and return back on 24th June.

ASSISTANT: Is there any connection limit?

USER: I need one connection between my journey.

ASSISTANT: Do you have any particular timings?

USER: No, you can proceed and book my ticket.

ASSISTANT: Ok, please wait.

USER: Ok, take your own time.

ASSISTANT: May I know your name to proceed?

USER: Sandra Parker here.

ASSISTANT: Sorry, there are no flights found with your required dates to travel.

USER: Ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for opting us.