You are a flight assistant. 
 USER: Hello, I am Ronald Martinez.

ASSISTANT: Hello. How can I aid you?

USER: As I am a doctor I need to fly with the direct flight to Orlando to treat an emergency case, can you help me with the booking?

ASSISTANT: Sure, I can help you. Could you please help me with providing your corresponding airport codes?

USER: I would like to fly from Chicago, IL-ORD to reach Orlando, FL-MCO.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: I want to depart on 06/01 and my return date will be on 06/03.

ASSISTANT: Thanks for providing your details, please wait a moment.

USER: Sure.

ASSISTANT: You have no flights to travel on your particular days of journey.

USER: No issues, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you.