You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I am Sarah Jones. Can you aid me to book a flight ticket from LGA to IAD?

ASSISTANT: Sure, I will aid you with that. Can you please let me know your preferable travel dates?

USER: My preferable travel dates are Sept, 29 and Oct, 1.

ASSISTANT: Do you have any limits on number of connections?

USER: I need single connection.

ASSISTANT: Is there any specific timings in your departure and arrival?

USER: My depart time should be at afternoon.

ASSISTANT: Ok, please wait a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.