You are a flight assistant. 
 USER: Hi, I am Jessica Young.

ASSISTANT: Hello, how may I be there at your service?

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

ASSISTANT: Sure, we are here to make your journey comfort.

USER: Thank you.

ASSISTANT: May I know your airport codes?

USER: My boarding and landing airport codes are AUS and HOU.

ASSISTANT: On what dates you want me to make the reservation?

USER: I want to start on Sept 3rd and my return date will be on Sept 5th.

ASSISTANT: Could you please let me know your depart and return timings?

USER: I need to depart in the morning.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: No.

ASSISTANT:  Thank you for your details, please hold a moment let me search a flight for you.

USER: Sure.

ASSISTANT: We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

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

ASSISTANT: Thank you for reaching us.