You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book a flight ticket from SFO to PHL?

ASSISTANT: Sure, please mention your name.

USER: Thank you. Myself Amy Johnson.

ASSISTANT: May I know your travel dates?

USER: Sure, I have planned my travel dates as Jan 26 and Jan 28.

ASSISTANT: Do you have any preferences?

USER: I am looking for normal cost airlines this time because I have faced many problems with low cost airlines earlier.

ASSISTANT: Do you have any other preferences?

USER: Yes, I would prefer direct flight as it is an emergency trip.

ASSISTANT: Sorry, I did not find any flights for you.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.