You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am a human rights activist, I have to host a campaign for orphan kids. So please book my ticket from EWR to LGA.

ASSISTANT: Sure, could you please tell me your trip dates?

USER: My itinerary dates are 10/25 and 10/27.

ASSISTANT: Ok, may I know your name?

USER: My name is John Thompson.

ASSISTANT: Sorry, there is no flight available on your given travel dates.

USER: It's ok, thank you.

ASSISTANT: You are welcome and thank you for choosing us.