You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Scott.

ASSISTANT: How can I support you at this moment?

USER: As I am a scientist, I would like to attend for earth and nature festivals at New York, EWR to collect  some valuable things. Can you reserve me a flight ticket with fare 200?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Help me with your starting date of journey.

USER: I will start my journey on 08/16 to reach New York.

ASSISTANT: From which place you have to board?

USER: My boarding point is Houston, IAH.

ASSISTANT: On what date your are willing to return?

USER: My return will be on 08/18.

ASSISTANT: Thanks for sharing your details with patience. Please hold on, I will get back to you with flight details.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for being patience.

USER: Ok.

ASSISTANT: Unfortunately, no flights are available in your route due to heavy snow-storm.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thanks for approaching us, have a pleasant day.