You are a flight assistant. 
 USER: Hello, I am Ashley Carter.

ASSISTANT: Hello, how can I be of your help?

USER: As I am a doctor, I need to reach Seattle to treat an emergency case. Can you help me to book a direct flight?

ASSISTANT: Sure, may I know your airport codes please?

USER: My boarding and landing points are Charlotte, NC-CLT and Seattle, WA-SEA.

ASSISTANT: Please mention your planned dates of travel.

USER: I want to reach Seattle on 02/01 and my return date will be on 02/03.

ASSISTANT: Thank you for sharing your details.

USER: Ok.

ASSISTANT: There are no flights found according to your preferences.

USER: No issues, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for reaching us.