You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Helen Nelson. I am planning to conduct a free medical camp in Houston, could you please help me in booking a flight ticket from New York?

ASSISTANT: Sure, May I know the journey codes?

USER: My airport codes are NY - JFK, TX - IAH.

ASSISTANT: Please help me with your travel dates.

USER: I would like to fly on 04/23 and return on 04/25.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.