You are a flight assistant. 
 USER: Hi. I am Karen Smith.

ASSISTANT: Hello. How may I serve you today?

USER: I want to book a direct flight ticket to attend an emergency case . Can you help me?

ASSISTANT: Please share your take off and destination airport codes.

USER: Thank you. SEA and CLT are my airport codes.

ASSISTANT: May I know your depart and arrival timings?

USER: I need to  return in the evening.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: 05/09 and 05/11 are my travelling dates.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No issue. Thank you.

ASSISTANT: Thank you for approaching us.