You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Thomas.

ASSISTANT: How may I assist you today?

USER: Can you please help me in booking my flight ticket from LGA to IAD?

ASSISTANT: Sure, let me know your trip dates please?

USER: My travelling dates are Jan 03 and Jan 05.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I want my return ticket at morning time.

ASSISTANT: May I know your connection limit?

USER: I need connecting flight flight.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, fine thank you for checking.

ASSISTANT: Thanks for opting us.