You are a flight assistant. 
 USER: Hi. I am Stephanie Carter here.

ASSISTANT: Hello, how can I assist you?

USER: I want to reserve my ticket from DCA to IAH, can you please help me in booking?

ASSISTANT: Sure, please provide your journey dates.

USER: Sure, my planned dates of journey are from Sep, 09 to Sep, 11.

ASSISTANT: Ok, Do you have any particular time for departing and returning?

USER: Yes, I need a depart time at evening and return time at morning.

ASSISTANT: Ok, Do you have any class preference?

USER: Yes, I need a economy class.

ASSISTANT: Ok, please provide your connection limit.

USER: I need a connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, No flights were found with your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.