You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, please let me know how may I help you?

USER: I would like to meet my friend at Houston, please help me in booking a ticket.

ASSISTANT: That's nice, sure, I will assist you. Could you give me your travel details like source airport and departure date please?

USER: My source airport code is DFW and my departure date is 06/20.

ASSISTANT: And from which airport you want to return and when?

USER: My destination airport code is IAH and my return date is on 06/22.

ASSISTANT: Ok, I will check the flights with the given information.

USER: Sure.

ASSISTANT: In the mean while, please tell me your name for documentation purpose?

USER: My name is Laura Clark.

ASSISTANT: Ok Clark. I am really sorry to inform you that, there are no flights running on the dates you have planned, because there is a cyclone on those dates.

USER: Ok, thank you for your information.

ASSISTANT: That's my pleasure. Thank you for reaching us, we will inform you if there are flights running on the planned dates.