You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Charles Phillips.

ASSISTANT: How may I support you today?

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

ASSISTANT: Sure, we are mirthful to help you. Kindly share your source and destination points.

USER: SEA and DTW are my airport codes.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: 07/10 and 07/12 are my travelling dates.

ASSISTANT: Please share your fare preference.

USER: 5000 is my fare.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, 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 availing us.