You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am looking for a flight from IAH to IAD. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you mention your travel dates please?

USER: My travel dates are from May 26 to May 28.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight in my journey.

ASSISTANT: May I know your depart and return timings?

USER: I would like to depart in the evening time.

ASSISTANT: Is there any airline preference do you have?

USER: Yes, I would prefer not to fly a low-cost airline.

ASSISTANT: Do you need any other specifications?

USER: No, thank's for asking.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: May I know your name please for the purpose of booking?

USER: Sure, myself Stephanie Johnson.

ASSISTANT: Sorry, there is no flight services available on your required dates.

USER: Not a problem. Thank you for your service.

ASSISTANT: Thank you for contacting us.