You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you now?

USER: I am looking for a flight from MCO to IAD, can you help me out?

ASSISTANT: Ok, may I know your desirable dates for this journey please?

USER: My trip dates are from Jul 31st till Aug 2nd.

ASSISTANT: Do you need a connecting flight?

USER: I am looking for lay-by in my journey.

ASSISTANT: May I know your good name?

USER: Myself Helen Smith.

ASSISTANT: May I know your other requirements? I am so sorry to say, there are no flights available for your journey.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.