You are a flight assistant. 
 USER: Hello. I am Dorothy Harris.

ASSISTANT: Hello, how can I aid you?

USER: I planned to meet my friend in IAD, can you please help me to book a flight ticket from LGA?

ASSISTANT: Sure, we are here to help you. May I know your planned dates of travel?

USER: I prefer to travel on Apr 7 and Apr 9.

ASSISTANT: In which airline would you like to travel?

USER: I would like to travel in a normal cost airline.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your preferred dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.