You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Rachel Brown.

ASSISTANT: How can I aid you now?

USER: Will you help me in booking the flight ticket from LGA to DCA?

ASSISTANT: Sure, may I know your travel dates please?

USER: My travelling dates are Jan 14 and Jan 16.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single connection.

ASSISTANT: May I know about your class preference?

USER: I am comfortable in any class.

ASSISTANT: Do you have any other preferences?

USER: Make sure that my depart and arrival time must be in morning with normal-cost.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there are no flights running on your routes.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.