You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Lopez.

ASSISTANT: Deborah Lopez, how may I render you?

USER: I need to go New York city to meet my friend so please help me with flight ticket booking from DCA to LGA.

ASSISTANT: Sure, please provide your itinerary dates.

USER: Thank you. I have planned my travel dates as Sept 09 and Sept 11.

ASSISTANT: Do you have any specifications?

USER: Yes, I would like to depart in the morning time.

ASSISTANT: Do you prefer a direct or connecting flight?

USER: I am preferring single connecting flight mostly.

ASSISTANT: Do you have any other specifications?

USER: No, I am ok with airlines.

ASSISTANT: Please give me a moment to check for available flights.

USER: Sure, take your time.

ASSISTANT: Sorry, no flight is available in the morning.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.