You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am a scientist and I would like to do research on plants, so I need to travel Houston. Is there any flight available?

ASSISTANT: Can you provide your airport codes?

USER: Sure, the regional airport codes are ORD and HOU.

ASSISTANT: Please mention your travel dates?

USER: The planning dates would be on 11/22 and 11/24.

ASSISTANT: There is a direct flight with flight number 1021 with price is 100, can I proceed with booking?

USER: No, please do not book the ticket.

ASSISTANT: Sorry for the trouble, thank you for reaching us.

USER: It's alright.

ASSISTANT: May I know your name please?

USER: I am Kevin Mitchell.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your service.