You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily Thompson.

ASSISTANT: Emily Thompson, how may I assist you today?

USER: I am planning to conduct a free medical camp in Seattle, so please book a flight ticket from LGA to SEA.

ASSISTANT: Good to know that. I will help you. Please let me know with your class preference.

USER: I am comfortable with any class.

ASSISTANT: Please help me with your planned travel dates.

USER: I want to fly on Oct 29, return on Oct 31.

ASSISTANT: May I know if you need a direct or connecting flight please?

USER: I want direct flight.

ASSISTANT: Please let me know with your preferred depart and return time.

USER: My depart time should be afternoon.

ASSISTANT: Do you have any other preferences with respect to your journey?

USER: No.

ASSISTANT: I am sorry to inform you that there are no active flights available as per your preference.

USER: No problem, thank you.

ASSISTANT: Emily Thompson, thank you for reaching us. Have a great time.