You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to meet my friend at Washington-DC, can you please book my flight ticket from LGA to IAD?

ASSISTANT: Sure, please help me with your travelling dates.

USER: Thank you. I would like to depart on Jan 24th and return back on Jan 26th.

ASSISTANT: Ok, Do you prefer business class or economy class?

USER: I am fine with any of the class.

ASSISTANT: Ok, May I know your connection limit?

USER: Please check for the flight having single connection.

ASSISTANT: Ok, Is there any other preferences?

USER: No.

ASSISTANT: Ok, please provide your good name.

USER: Myself Deborah Lopez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your patience, we did not find any flights with your given requirements.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for opting us.