You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I want to fly to Philadelphia to attend a comic con on Jan 11th and I'll return within two days that is on Jan 13th, can you please help me in booking?

ASSISTANT: I understand your request and glad to help you. Could you please share your origin location airport code?

USER: Sure, I want to start my journey from MCO and my landing airport code is PHL.

ASSISTANT: Could I have your name please?

USER: I am Samantha Miller.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I want to fly with the connecting flight for this time.

ASSISTANT: Ok, do you have any other specifications?

USER:  No more specifications for this trip.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: You are welcome, have a great day.