You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, firstly may I know your good name please?

USER: Ruth Mitchell here.

ASSISTANT: I hope you are fine, how can I help you?

USER: My grandfather health is serious, so I want to book the direct flight.

ASSISTANT: That's sad to hear, I will check with that, may I know the travelling dates please?

USER: My travel dates are 10/22 and 10/24.

ASSISTANT: Can you please tell me the takeoff and landing airport codes?

USER: My take off airport code is IAH and landing airport code is IAD.

ASSISTANT: Please wait for a while, I will check the details and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for patience, there is no flight with 0 connection limit.

USER: No problem, I will go by train.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you for your information.

ASSISTANT: You are welcome.